Gender and labour-market outcomes

Andrew E. Clark (Paris School of Economics – CNRS)http://www.parisschoolofeconomics.com/clark-andrew/

APE/ETE Masters Course

BROAD QUESTION“Why do some groups do less well in the labour

market than others?”

Subsidiary question:“Should we be doing anything about it?”

It is interesting to look at this question with respect to gender as this is not a matter of choice: there is no endogeneity problem (as there is with industry, location or education, for example).

Outcomes can be in terms of: • Getting a job (the employment rate)• Wages• Job quality (stability/interest/effort/satisfaction…)• Promotions

We’ll mostly concentrate on wages.

EmploymentThe percentage of employment accounted for by women

in G7 countries in 1978 and 2011 has risen by six to ten percentage points in most countries.

% of Employment accounted for by Women (OECD)1978 1998 2011

Germany 38.9% 43.6% 46.3%Canada 38.3% 45.5% 47.8%USA 41.2% 46.2% 47.0%France 39.0% 44.5% 47.5%Italy 31.1% 36.5% 41.0%Japan 38.5% 40.9% 42.6%UK 39.5% 44.9% 46.6%

The 2011 figure is remarkably similar across G7 countries, with the exception of Italy and Japan.

These figures are for all employment; if we look at employees only, then the situation is even more egalitarian.

In the UK in 2002 there were more female employees than there were male employees (SE is overwhelmingly male).

French figures for number of women in employment:

1965 6.5M2000 12M2012 13.5M

Female LF participation rates in France:1962 40%2014 80%

2009 Male Employment Rates

60

65

70

75

80

85

90

95

Hun

gary

Turk

ey

Esto

nia

Pola

nd

Bel

gium

Slov

ak R

epub

lic

Spai

n

Fran

ce

Irela

nd

Finl

and

Italy

Slov

enia

Chi

le

Luxe

mbo

urg

Cze

ch R

epub

lic

Gre

ece

Uni

ted

Stat

es

Portu

gal

Swed

en

Can

ada

Ger

man

y

Uni

ted

Kin

gdom

Aus

tria

Kor

ea

Aus

tralia

Den

mar

k

Nor

way

Mex

ico

New

Zea

land

Net

herla

nds

Icel

and

Switz

erla

nd

Japa

n

2009 Female Employment Rates

24

34

44

54

64

74

Turk

ey

Chi

le

Mex

ico

Italy

Gre

ece

Hun

gary

Slov

ak R

epub

lic

Pola

nd

Spai

n

Kor

ea

Bel

gium

Luxe

mbo

urg

Cze

ch R

epub

lic

Irela

nd

Fran

ce

Japa

n

Esto

nia

Slov

enia

Portu

gal

Ger

man

y

Uni

ted

Stat

es

Uni

ted

Kin

gdom

Aus

tria

Aus

tralia

Finl

and

New

Zea

land

Can

ada

Net

herla

nds

Swed

en

Den

mar

k

Switz

erla

nd

Nor

way

Icel

and

Male Employment Rates

65

70

75

80

85

90

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

Canada

France

Germany

Italy

Japan

United Kingdom

United States

G7 countries

Female Employment Rates

40

45

50

55

60

65

70

75

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

Canada

France

Germany

Italy

Japan

United Kingdom

G7 countries

Female employment is less cyclically-sensitive than that of men?

France in detail: catching-up in terms of labour-force participation

And especially in terms of the employment rate

France is dissimilar to the UK because of its collapse in male employment

One fact that is consistent with rising female employment is the continuous rise in female wages (in a labour-supply perspective).

The “raw ratio” of male to female wages was around 2/3 for a long time; has more recently risen to something like 4/5.

Wage rises have both a substitution and an income effect. For those who do not work, there is only a substitution effect, which will increase employment.

Participation decision:V(Y0 + w1h1, 24-h1) > V(Y0, 24)

Rising wages encourage participation.

Is there a plateau here?

OECD Figures

Notes: Full-time employees. The gender wage gap is unadjusted and defined as the difference between male and female median wages divided by the male median wages. Source: OECD, 2010

The OECD figure has the gender wage gap in France at 15%

INSEE has it at 20% (although this is in terms of salary, so could reflect FT hours differences)

Another point is that INSEE is in terms of means, and the OECD in terms of medians.

Solution of the difference: male wages are relatively more pulled outwards above the median.

So in many countries, there has been substantial progress in the position of women on the labour market.

There is a definite movement towards equality in terms of the percentage who are in employment, and in terms of relative wages.

But does that mean that it’s “job done” in terms of labour-market equality?

Or is there still some gender discrimination on the labour market?

Bifurcation of male and female careers at an early stage of their careers.

France. 1997-1998 % WomenSeconde > 50Terminale Scientifique 42Classes prépa scientifique 28Ecoles d’Ingenieurs 22Ecole Polytechnique13

(Agrégation en Economie (RIP): jury 96% male)

Figure 2. French spouses’ average age and education differences, by year of birth of the husband.

-1.00

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00

Age difference, in years

Husband' s year of birth

Education difference, on a scale from 1 (elementary) to 7 (College).

US: All cohorts of U.S. women born since 1960 have had higher average years of schooling than their male counterparts (Charles and Luoh, 2003

Great Britain. 2002 M F2+ A-Levels 32% 41%Empt. Age 16-64 79% 67%FT pay per hour 100 81

(£12.60)(£10.20)

Managers (share) 69% 31%MPs (share) 82% 18%

There has been progress in the UK in terms of the female share of MPs in Parliament

Country or areaQatar 0Saudi Arabia 0Solomon Islands 0Yemen 0.3Sri Lanka 5.8Myanmar 6Brazil 8.6J apan 10.8India 11Liberia 11Russian Federation 13.6United States of America 17United Arab Emirates 17.5I taly 21.6United Kingdom 22.3France 26.9New Zealand 32.2Spain 36South Africa 42.3Finland 42.5Senegal 42.7Sweden 44.7Cuba 45.2Rwanda 56.3

2012

The percentage of women in Parliament, 2012

Source: UNDP Gender Page

Most attention has probably been paid to sex discrimination in wages: if this exists, it applies to over 50% of employees….

WagesThe key question that all theories of

discrimination have to address is:

How can discrimination persist in a profit-maximising world?

Think of this in a piece-rate way. wF = FQF; wM = MQM; F < M. Women are

paid less per piece.But this implies that women’s cost of production

is lower: wF/QF < wM/QM

A non-discriminatory firm will hire women, rather than men, as this is profit-maximising.

Demand for women will rise, and for men will fall, until equilibrium between wages is restored (M = F).

Theories of Discrimination1) Taste for DiscriminationDisutility from coming into contact with certain

groups: it may be preferable to incur a cost to avoid this.

Can present this in terms of employers, employees or customers. Think of firms.

That they are will to pay money to avoid hiring certain groups underlines that they cannot be maximising profit. Firms are maximising some function that includes profit… and something else.

U = f(, % Men). + +

I1

% Men

Imagine that F and M perfect substitutes in production: then the isoquant (showing how profit and % Men trade off against each other) is horizontal. Utility maximisation by the firm produces a 100% male workforce.

I1

% Men

Q1

100%

For any given level of profit, firms will maximise their utility by having a male workforce.

This drives home that:In order for women to be employed, their wages

(at equal productivity) have to be lower than men’s (so that the iso-profit curve above slopes downwards).

If wF < wM, then the firm sacrifices profit to “buy” discrimination.

That they are willing to pay money to avoid hiring certain groups underlines that they cannot be maximising profit. Firms are maximising some function that includes profit… and something else.

2 (all women, no men) is greater than *, but produces lower utility.

I1

% Men

2

*

One way of thinking about this heuristically is that, while men cost w in wages, women cost w+d:

d < 0: the firm likes women

d = 0: sex-neutral

d > 0: the firm doesn’t like women.

As “d” increases, the firm’s indifference curves become steeper.

Market level: there are some discriminatory firms, and some non-discriminatory firms.

NF

wF/wM S1

1

The demand curve is kinked at Na. Non-discriminatory employment up to this point. Employment beyond Na requires discriminatory employers, so that wF < wM. Measured wage differences between men and women depend on three things:

The position of the supply curve

The number of non-discriminatory employers (position of Na)

Taste for discrimination amongst discriminatory employers (slope after kink).

S2

Na

The same kind of result will be found from Customer discriminationCustomers may prefer to be served by a man in a bar, or

by a woman in a plane, and will pay a higher price for this service.

Employee discriminationCertain groups of employees may not like working with

other groups, and will require higher wages in order to do so.

Does occupational segregation reflect this phenomenon?

Key question: why don’t non-discriminatory firms drive out discriminatory firms?

Answers in the “taste for discrimination” senseA) They are, but it takes time (see slow rise in

wF/wM over past 30-40 years).B) There is no drive to do so when there is no

competitive pressure: market power, or public sector.

C) Akerlof. Discrimination is a social norm, and it is costly to deviate from the norm (a touch of ad hoc here perhaps).

A testable implication of employer discrimination is that (ceteris paribus) profits should rise with the percentage of female workers.

Hellerstein, Neumark and Troske tested this in US data and found evidence in favour of it.

Sano repeated the analysis in Japan and finds that it holds only in industries with high concentration: only firms in non-competitive industries can engage in discrimination at the expense of profits.

Customer discrimination in films: the Bechdel test.

The Bechdel test was invented in 1985 by cartoonist Alison Bechdel, as a way of measuring gender equality in film-making: to pass, movies must feature at least two named women having a conversation with each other about something or somebody other than a man.

ESPN blog FiveThirtyEight examined 1,615 films released between 1990 and 2013 in an effort to test the theory that female-centric movies are less likely to make money for studios. 53% pass the test.

The average gross return for a film that passed the test was $2.68 (£1.61) for each dollar spent, compared to just $2.45 (£1.47) for a film that failed the test. This was despite male-centric movies receiving higher budgets: an average of $48.4m (£29m) to just $31.7m (£19.9m) for those that passed the test.

Other Major Theories.Statistical DiscriminationThe key here is asymmetric informationFirms make inferences about an individual

worker based on average characteristics of the group to which they belong.

Here, employers believe that women are less productive than men due to lower average levels of schooling maybe: apply stock characteristics to flow individuals.

Four points:1) Statistical Discrimination may be based on beliefs,

rather than facts. 2) Statistical Discrimination can explain why

adjustment is slow (run hot water into a cold bath). 3) Effect of SD should disappear over time, as firm

learns each individual’s “real” productivity: a theory of new hires?

4) If beliefs are unfounded, women will be bid away from SD firms by other firms with better beliefs: good information will drive out bad.

Dual Labour MarketsThere are Primary and Secondary Sectors

High wages Low wagesSecure UnstableGood conditions Bad conditions

Women tend to be found in the secondary sector.But why?• Efficiency wages• Specific Human CapitalWho knows.

MarriageSpecialisation within the couple. Gains from

trade. Which just so happens to be men in the labour market, and women in domestic tasks.

Certainly matches observed tendencies in employment rates and hours of domestic work per week (F=28, M=14 in France).

UK FiguresWork Housework

M 45 5F 30 19

This matters because it probably leads to career interruptions for women, and the associated loss of human capital. All labour-market interruptions reduce earnings

One year of unemployment reduces wages by 5% (M) and 4% (F);

One year of inactivity reduces wages by 6% (M) and 2% (F).

The is smaller for F than for M, but the incidence is far higher, which can explain women’s lower wages (w = ’X, remember).

Personnel EconomicsThere are good jobs (A) and bad jobs (B). The

distribution of ability is the same for Men and Women. (otherwise this would be a boring theory). There are two periods.

Bad (non-investment) job for an individual with ability of .

q1B =

q2B =

Good (investment) job.q1

A = 1q2

A = 2

There is learning in job A. We have:1< 1 < 2 (this is the investment)

1+ 2 > 2 (such that investment is worthwhile)

All workers work in period 1; will they do so in period 2? Value of time in period 2 is a random variable , with (key assumption):

Fm() > Ff() (distribution for F stochastically dominates that for M)

Women have better non-job opportunities in period 2 (and thus are more likely not to work).

A worker hired into job B has the return given by the first equation on page 96; a worker in job A has the return given by the second equation.

The difference in the expected return (the advantage of job A) is given by D(), at the bottom of page 96. This has the form given in Figure 7.3 at the top of page 97.

Unsurprisingly, low ’s ( < *) are better off in non-investment jobs, high ’s are better off in investment jobs (sorting by ability).

So far, so unsurprising. The key result of this piece of analysis is that the D() function, which determines *, depends on F(). This latter is not the same for men and women, and Lazear shows that F* > M*: the cut-off ability point to take the investment job is higher for women (because there is a greater chance that they won’t be in employment in period 2).

Second prediction is that the average ability of women in investment jobs will be greater than the average ability of men in the same job (selection is more rigorous for the former).

Women are penalised by “better” outside options.

SignallingThis builds on statistical discrimination.Real productivity, q, is unobservable.Observe a signal si

j for individual i in group j:si

j = qi + ij

Both q and are random variables:i

j ~ N(0, 2i)

qi ~ N(, 2q)

q and are independent of each other.The distribution of ability (q) the same for men and

women; however women’s productivity signals are considered to be less precise (probably because they are interpreted by men…).

Wage = expected productivity. It can be shown using Bayes’ Rule (Phelps, 1972) that the employer’s best estimate of productivity is as follows:

wij = E(qi | si

j) = (1-2j) + 2

jsij

The key parameter here is j, which is the correlation coefficient between q and the signal si

j.

2j = 2

q/(2q + 2

i)

Implications:

If there is no correlation between the signal and productivity then everyone paid at average productivity of .

Perfect signal implies that individuals are paid at their own productivity signal of qi = si

j.

What about sex differences?We have 2

F < 2M

Then women with a positive signal (of sij > ) receive less than a

man with the same signal (because believe woman’s signal less).BUT ALSO:Women with a negative signal (of si

j < ) receive more than a man with the same signal (ditto).

There is no difference in average wages by sex (average wages are ) – can’t predict average wage discrimination. But the slope in ability is flatter for women.

Lundberg and Startz add human capital to Phelps’ model. This is chosen by workers. Costs the same M/F, but less well-rewarded for F (because put less weight on signal), therefore they’ll choose less of it in equilibrium). This produces average wage differences (the ’s are no longer the same).

Do we know that 2F < 2

M?

Place, Todd, Penke, and Asendorpf, “The Ability to Judge the Romantic Interest of Others”, Psychological Science, Jan. 2009, Vol. 20 Issue 1, p22-26

Test this ability using 3min videos of individuals on speed dates: at the end of the real speed date, individuals wrote down whether they were interested in seeing the other person again.

Can an outside observer predict that romantic interest?Participants watched shortened video clips that were either 10s or 30s long and

came from the beginning, middle, or end of the date.• Observers predicted interest successfully using stimuli as short as 10s, and

they performed best when watching clips of the middle or end of the speed date.

• There was considerable variability between daters, with some being very easy to read and others apparently masking their true intentions.

• Male and female observers were equally good at predicting interest levels.• Both sexes they were more accurate when predicting male interest:

Predictions of female interest were just above chance.

Do outcomes reflect preferences? Niederle and Vesterlund, QJE, 2007

I’m not going to argue that women have a preference for lower pay…. but are they less competitive, so that they prefer piece rates over tournaments?

Four explanations of women entering tournaments less

1) F don’t like to compete2) M are overconfident3) F are more risk-averse4) M are less-averse to feedback

Tackled experimentally:

A real Maths task, under both piece rates and tournaments. Add up five two-digit numbers

Answer filled in on computer screen.Individuals told whether they’re right or wrong, and

then go on to a new problem.Running sum of scores (correct and incorrect) displayed

on screen.Five minutes to solve as many problems as possible.

NB. There are no gender differences in Maths ability scores in the US.

Individuals play in rows of four: 2M and 2F.Told that they are playing with other row members.Two or three of these rows per experiment.

20 row groups in the experiment (thus 80 people)4 tasks per experiment; one randomly-drawn one is paid.

$5 show-up fee$7 completion fee.

Payment Schemes:

1) Piece rate of 50 cents per correct answer.2) Tournament. Each individual per row who gets the

most correct answers receives $2 per correct answer3) Choice between 1) and 2).

If individuals choose the tournament then their task 3 score is compared to others’ scores in task 2 (so that there is no externality on others from choosing the tournament – avoids altruism issues).

4) Choice of payment scheme for results from 1): piece rate or tournament (no actual performance of task here).

Confidence:Individuals are also asked how well they think they did in tasks 1)

and 2). Guess their rank from 1 to 4. Paid $1 for each correct answer.

Experiment lasts 45 mins on average, with average earnings of almost $20.

ResultsA) As in the national figures, there are no sex differences in

number of correct answers in tasks 1 and 2 (where there is no choice over the compensation scheme. Average no. of problems solved correctly in task 1 is 10.5, and 12 in task 2 (tournaments work!).There is equally no difference in the sex of the winners in task 2: 11M and 9F.

When they have the choice (in task 3), there is a substantial sex difference in the percentage of respondents who choose the tournament:

F 35%M 73%

Despite there being no sex difference in actual performance.

Explanations1) Risk-aversionConsider those with 14 correct answers in task 2. If they produce

the same performance in task 3, they have a 47% chance of winning (looking at the distribution of number of correct answers).

Expected value of tournament is 0.47*$2*14 = $13.16Value of piece rate (sure thing) is $0.50*14 = $7

Of those with 14+ correct answers in Table 2, 8/12 F and 3/12 M refuse this gamble (or better).

Same thing for those with fewer than 12 correct answers. P(win)=5.6%.

EV of tournament is 0.056*11*$2 = $1.23Value of piece rate is 11*$0.50 = $5.50

Of those with 11 or fewer correct answers in Table 2, 11/18M and 5/17F accept this gamble (or worse).

Too many high-performing women refuse tournaments, and too many low-performing men accept them.Women would have to be exceptionally risk-averse and men exceptionally risk-loving

2) Over-confidence

Both Men and Women are overconfident (in that they predict that their rank will be higher than it actually turns out to be).

75% of men predict rank 1.43% of women predict rank 1.

This explains part of the difference in tournament entry.

3) Taste for competition

Look at choices in Task 4, where tournament choice does not involve a competitive performance. Even here, men choose tournaments more than do women.

Remainder of difference suggested to result from preferences

My notes on this work.

This does assume that men and women are free to choose their compensation scheme. When they aren’t (piece rate in task 1; tournament in task 2), men and women do just as well as each other.

Even when there is sorting, and men way more likely to choose tournaments, unclear that women end up earning less (women don’t enter tournaments when they should…but men enter tournaments when they shouldn’t).

Testing for discrimination: is it really that easy?

17% d'écart de salaire 100% d'inégalités

Testing for discriminationMen and women differ in many ways: this calls for

multivariate regression analysis.A) Simple approach. There is a fixed wage premium

for being male. Estimate:Ln wi = A + ’Xi + Fi + i

Test of discrimination: estimated value of < 0.B) The value of may not the same for men and

women: observable characteristics differently rewarded.

“the prices paid by employers for given productive characteristics are systematically different for different demographic groups”

We then estimate:Ln wi = Ai + i’Xi + i

The average difference between men’s and women’s wages is:

Ln wM – ln wF = AM - AF + (M’XM - F’XF)= AM - AF + (M - F)’XM + F’(XM - XF)

Three sources of pay differences:1) Differences in pay with same X and : (AM - AF)2) Different rewards to characteristics: (M - F)3) Different characteristics: (XM - XF)

This is known as the Oaxaca or Blinder decomposition

What variables do we put in X?Standard stuff: age, education, occupation, region, hours,

experience etc.These are all observable. The X’s explain a fair amount of the raw

wage difference.USA 1988 France 2000Raw wF /wM = 0.72 0.75wF /wM | X = 0.88 0.88

Labour-market experience is an important variable.Is the rest discrimination? How do we know whether we’ve

measured all of the relevant RHS variables?Panel data no use in cleaning these out as male/female fixed over

time. Unobserved higher skill or discrimination?

Other things to know1) MRI seems to point to relatively few circuit

differences between men and women.2) Average weight of brain 180g less for women. A

view from Wiki Answers:The brain weight of the bull African elephant is between

4.2 kg and 5.4 kg The brain weight of the cow African elephant is between

3.6kg and 4.3 kg

Aristotle noted that women have smaller brains. But women are smaller too. Suggested that "women's brains are relatively larger than men's proportional to their size". Not that there is any obvious link between brain size and intelligence anyway

3) Much regression analysis holds different X’s constant when looking at the partial correlation between women and earnings.

But these X’s can themselves be the results of discrimination

Human capital decisions will be taken as a function of the wages on offer, or of the wage profile.

4) Beware of Macro shocks masquerading as micro equilibria.

Unemployment is associated with lower pay (Blanchflower and Oswald, The Wage Curve):

Ln wi = A + ’Xi + Fi + lnUi + i

Estimates of across many different countries give similar results: =-0.1. Ten percent rise in unemployment reduces wages by 1%.

This helps to explain wage differentials only if women are systematically subject to worse demand conditions than are men.

Which is true in some countries, but far from all. Unemployment rate Female (% of male rate)

0

50

100

150

200

250

1 3 5 7 9 11 13 15 17 19 22 26 32 37 52

HDI

%

Unemployment rate Female (% of male rate)HDI Rank Country 20061 Iceland 1102 Norway 943 Australia 1044 Canada 945 Ireland 896 Sweden 1037 Switzerland 1388 Japan 919 Netherlands 12610 France 12111 Finland 10912 United States 10013 Spain 18414 Denmark 13615 Austria 11816 United Kingdom 8617 Belgium 12618 Luxembourg 18019 New Zealand 11720 Italy 16522 Germany 11924 Greece 24326 Korea (Republic of) 7629 Portugal 13832 Czech Republic 15336 Hungary 10837 Poland 11642 Slovakia 12052 Mexico 11884 Turkey 106

5) In Anglo-Saxon countries at least, women seem to report higher levels of job satisfaction than do men.

Most of the observable characteristics of jobs are less good for women than men.

So there must be an unobservable that works in the other direction.

This could be some measure of job quality that doesn’t appear in surveys.

Or it could be a relative-utility term, whereby outcomes are evaluated relative to expectations, and women have lower expectations.

Increasing women’s job quality may therefore bizarrely reduce their job satisfaction (if effect on expectations greater than the effect on outcomes). We see a shrinking job satisfaction gap in the BHPS.

A story from a recent Guardian article.

England 1, Denmark 0

We mostly don’t know much about expectations, although they would seem important.

Schwandt (2014) uses direct information on well-being aspirations in SOEP data by asking individuals how satisfied they think that they will be with their life in five years’ time. This is compared to the satisfaction that the individuals actually report in this panel data five years later.

Forecast error = Et(Sft+5) - Sft+5

Individual predictions are systematically wrong.

Errors in particular move from an overprediction of satisfaction when young to an underprediction when older

Could this explain the “satisfaction smile”?

Expectations may also explain the small or zero effect of education on happiness.

Clark, Kamesaka and Teruyuki (2015): education is associated with greater happiness but also higher happiness aspirations (higher aspirations act as a deflator).

If education raises aspirations faster than outcomes, it will be negatively correlated with subjective well-being.

6) Differences in the mean level of something…. Or in the second moment?

Johnson, W., Carothers, A., and Deary, I. (2009). "A Role for the X Chromosome in Sex Differences in Variability in General Intelligence?". Perspectives on Psychological Science, 4, 598-611.

A rather hot debate about the shape of the distribution of general intelligence around the mean.

There are sometimes more men than women at the tails of the distribution (Pope and Sydnor, JEP, 2010).

Econometrics is difficult to do properly. Turn to natural experiments.

Goldin and Rouse, AER, (2000).Make hiring sex-blind….literally.Symphony orchestras. Candidates audition in

front of conductor and other orchestra members.

Prior to 1970, identity of candidate known.In the 1970s and 1980s blind auditions were

adopted: candidates play behind a screen.

Pre-1970: 10% of new hires were women;1990s: 35% of new hires were women.

Part of this reflects labour supply of course. But Econometric analysis suggests that 1/3 of the rise was due to the “sex-blind” screen (i.e. women were only offered just over half of the jobs that they should have been offered on the basis of ability alone).

Audit or correspondence methods

Audit methods involves face-to face interaction

Like sending black then white individuals to ask about renting a flat.

Or seeing what prices different people are charged for drinks in New Orleans bars.

Correspondence method involves no face-to-face interaction.

Bertrand and Mullainathan, AER, (2004).The effect of race on hiring

Correspondence method Résumés sent in response to help-wanted ads in Chicago

and Boston newspapers. Some CVs of higher quality (qualifications) than others. Four CVs sent in response to each advertisement.

Responded to 1300 ads and sent around 5000 CVs. Randomly assign a non-White sounding name to one of the low-quality and one of the high-quality CVs.

Two white and two non-white names in each batch of CVs.

Something like: Emily, Greg, Lakisha, Jamal.

White names receive 50% more interview offers (White name CVs need to send 10 CVs to get a callback; non-White name CVs need to send 15).

Higher quality CV increases callback rate by 30% for Whites, but by less for non-Whites.

The discrimination gap in hiring rises with education.

Audit methods have also been used to evaluate discrimination in the labour market with respect to:

• Gender (Petit and Duguet, Annales d'Economie et de Statistique, 2005)

• Homosexuality (Drydakis, Labour Economics, 2009)

• Obesity (Rooth, Journal of Human Resources, 2009).

Bear in Mind…

Theories of discrimination have to explain both the cross-section finding (women earn less than men), and any time-series trend.